Display screen with a graphical user interface



FIG. 1 is a first embodiment of a display screen with a graphical user interface; and,

FIG. 2 is a second embodiment of a display screen with a graphical user interface.

The broken line showing of the electronic device and display screen is for the purpose of illustrating environment and forms no part of the claimed design. The broken line showing of elements on the display screen illustrate portions of the article and form no part of the claimed design. 

CLAIM What is claimed is the ornamental design for a display screen with a graphical user interface, as shown and described. 